Malicious PDF — malware analysis report

Static analysis result for SHA-256 692966a0703f8073…

MALICIOUS

PDF

66.0 KB Created: 2020-09-01 03:19:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da1f8f170c75b57052cf869fa4de3489 SHA-1: 71ccf6cc4b6fae4e33c040e6c83e4fa9a54ea376 SHA-256: 692966a0703f8073edbc86042f8750dad0dff7e5dd59a368faf8aeaba4810bc1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains embedded URLs that point to a redirector service, disguised with a filename suggesting a financial report. The ML classifier strongly indicates maliciousness, and the presence of numerous external PDF links suggests a link farm or SEO poisoning attempt. The primary malicious URL is https://ttraff.com/wix?keyword=auditor%2527+s+opinion+annual+report, which likely leads to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/wix?keyword=auditor%2527+s+opinion+annual+report
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_f27b1b26760645159a8becefc4c798b6.pdf
    • https://static.usrfiles.com/ugd/b8c837_5eed99d82ee74410ab42ccda4f97eaf5.pdf
    • https://static.usrfiles.com/ugd/b8c837_d2fc01be6ca84681814b5d766f228403.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_8f450129d1e44330a3338f00ee45942b.pdf
    • https://static.usrfiles.com/ugd/7c3584_063235024eb940a7b7a8f254c046240d.pdf
    • https://static.usrfiles.com/ugd/b8c837_8fbb4db14bcf4200b898f6145b9b1716.pdf
    • https://static.usrfiles.com/ugd/b8c837_7fea06ac913840e3b882f4a042104acb.pdf
    • https://static.usrfiles.com/ugd/5899d5_8667de09273949239a444d8a9e1332da.pdf
    • https://static.usrfiles.com/ugd/b8c837_9e6c73a0db134c0095ad4887dd126290.pdf
    • https://static.usrfiles.com/ugd/b8c837_c89aa5002c7c46979440d512f1b8fc82.pdf
    • https://static.usrfiles.com/ugd/2ac701_59b13539c7bd4c9b9f4ec9fc030909c6.pdf
    • https://static.usrfiles.com/ugd/16a96a_b3ae103b3aaf4b0c827365cb12cf691b.pdf
    • https://static.usrfiles.com/ugd/76156b_d11dc7733337441691ce1110f77ec2b0.pdf
    • https://static.usrfiles.com/ugd/49be48_140077fad6c34f26be0d08a4ccf38790.pdf
    • https://static.usrfiles.com/ugd/22bf55_acbb364031204f6eb7a52dc04e304414.pdf
    • https://static.usrfiles.com/ugd/b8c837_b665a348b6144919aacb5c9f5cfc3fc8.pdf
    • https://static.usrfiles.com/ugd/cc15ef_1bbff9ee7e7c4dd5b2f3db3f1b1d2abc.pdf
    • https://static.usrfiles.com/ugd/4c1554_f1fae7eec0b64ec29883116b00a64392.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c710.bin
a446f03de4087c8fa501a573d7c81deca9df5172631dbbee2e7371ae49eedd76		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC710 4976 bytes
font_01_sfnt_off0000d80a.bin
9b3402efbbdac44a37d78794cc273ff1545d0f075848ee5aca6ee3be52e864fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD80A 10208 bytes

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